Dry ore-concentrator.



No. 879,069. PATENTED FEB. 11, 1908. G. TOLMIE.

DRY ORE CONGENTRATO A PPLIGATION FILED NOV. 20. 1906.

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W/TNESS s 7 nw lvrofi I aearye 2 0/1114? A TTORNE Y8 .N PATENTED FEB. 11 1908. v 0 879,069 G. TOLMIE' DRY (TEE OONCENTRATOR.

APPLIOATION FILED NOV. 20, 1906.

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INVENTOH aeaz'gvslbZin ze M '60 I A TI'OHNEYS IUNITEDSTATES PATENT OFFICE.

GEORGE TOLMIE, OF OGDEN, UTAH, ASSIGNOR OFONE-FOURTH TO DENNIS E. GLEASON, or;

. OGDEN, UTAH. I

nay onn-concnnrnaron.

- Specificationof Letters Patent.

- Application filed November 20. 1906. Serial No. 344-232.

Patented Feb. 11, 1908.

To all whomit may concern: Be it known that I, GEORGE TOLMIE, a

citizen of the United'States, and a resident of Ogden, in the county of Weber andStat'e of Utah, have invented a new and Improved Dry Ore-Concentrator, of which the following is a full, clear, and exact description.

'- This invention relates to ore concentrators and is especially applicable as a dry concen- :a concentratorof this class which in construction and .which will operate very trator to operate upon ores having a relatively high specific gravity.

The object of the invention is to produce is simple efficiently to separate the ore or values from the dirt and ganguewith which the ore oc-. curs.

The invention consists in the construction 'and combination of parts to be more fully described herinafter and particularly set forth in the claims. I

Reference is to be hadto the accompanying drawings forming a part of this specifica- Figure 1 is a side elevation of a concentrator constructed according to my invention;

Fig. 2 is a longitudinal vertical section taken joint of the machine and illustrating details of the construction thereof. I

Referring more particularly to the parts, 1

represents the frame of the machine, whichcomprises base sills 2 in which uprights or standards 3 are stepped as shown. These u rights support parallel upper sills 4. On tl fe side of the frame a longitudinally disposed horizontal bar or beam 5 is attached, the pur ose of which will appear more fully hereina ter. Near the upper portion of the frame inclined bars 6 are arranged, the same being rigidly attached in the framing as shown.

In the upper portion of the frame 1 there is mounted a feed hopper 7 which presents inclined sides or walls,- as indicated. At its lower ortion, the hopper is rovided with a feed opening 8, the extent 0 opening of which may be regulated by means of a door or shutter 9 which is slidably mounted on the side wall of the hopper asshown very clearly in Figs. 1 and 2. This shutter is controlled by means of a threaded stem 10 which The case extends toward the upper edge of the hopper, passing through a lug 1 1 which projects from the side wall thereof, as indicated. to the lug 1 1 the stem 10 is provide with nuts 12 which enable the shutter to be adjusted up or down, as will be readily understood. 7

Just below the hopper 7 I provide a shufil Ad'acent plate or feed plate 13 which is disposedin an This plate is lnclined position as shown.

side edges, to

provided with flanges 14 at its which short links 15 are pivotally attached,

the upper portions of these/links being attached respectively to the framing or .to the hopper as shown. This late is adapted to be reciprocated or rocked when'the machine is in operation, by means of apitmanor con necting rod 16, which ispivotally attached at 17 to'the upper edge of the plate. The

other end of the pitman is attached to a disk crank 18 which is rigid with a belt pulley 19, the said belt pulley bein driven by means of a belt 20 from a blower s aft 21. '.tion, in which similar characters of reference indicate corresponding parts in all the figures.

Just beneath thehopper in the frame 1 there is supported a blowercase 22 through which the aforesaid blower shaft 21 passes, and within this case a fan'23 is provided, which is rigidly mounted on the shaft 21. 22 is open at the sides so that the fan may generate an air current from the case through a trunk 24 which leads longitudinally of the frame and in the direction of the lower edge of the shuffle late 13. This trunk 24 is connected by a with a ring 26,- which ring constitutes a part of a concentrating table 27 This table 27 includes a substantially rectangular frame 28, as indicated most clearly in Fig. 3. In

the side bars of this frame there is rotatabl mounted a dumping shaft 29, and this shaf t carries rigidly the body or shoe 30 of the concentrating table. This shoe is preferably formed with a sheet metal bottom, wooden sides 31 and small end. The upper side of this body or shoe is covered by a screen 32, upon which the concentration occurs, the same being formed in three sections, 32, 32 32, which are of different mesh? for a purpose which -will be stated more fully hereinafter. The end of the shoe 30 which \lies adjacent to the ring 26 is open, and thisend of the shoe is out upon an inclined plane so as to enable the end of the shoe to seat against the ring 26in the manner indicated in Fig. 2. In

this connection it should be. understood that terial, which facilitates the forming of a tight 10 joint at this point. The end of the shoe pesite the ring 26 is covered by turning t e material of the bottom. upvwardly to form a flange 34, as indicated in 2. With this arrangement it should be understood that 5 when an air current is generated-by the fan this current will pass through the shoe and up throughthe. screen 32. The concentrating table 27 is supported by means of hangers 35', which hangers simply consist of links, the

- lower ends of which are pivoted to the frame 28 of the table, and the up er ends of which are pivotally attached to t e inclined bars 6 referred to above.

It willbe understood that the points of connection between the hangers and the frame 28 are loose soas to allow of a lateral play or rocking movement of the concentratmg table.

The. ore-bearing materialis carried onto the screen from the shuflie plate 13 by means of an apron 36, which apron consists simply of an inclined plate, the upper edge of whlch projects under the loweredge of the plate 13, and the lower edge of which projects over the ring 26. The side edges of this apron are turned upwardly,'as shown, so as to prevent the material from falling from the plate at 4 the sides. I e

The entireshoe 30 is covered b a large hood 37, which is preferably forms of sheet metal or similar material. The upper portion of this hood is formed into a neck 38, which communicates with a fan casing 39. in

which there is provided an exhaust fan 40.-

It should be understood that the material, after passing across the screen, is delivered upon a tail' plate 41, which is mountedin an inclined position as indicated most clearly in Fig. 2. The frame 28 preferably inclines in the same direction as the shuffle plate 13, and the screen 32 is similarly inclined. Near its u per edge the frame 28 is connected, by

a lin 42, with the up er side of the blower:

, trunk. 24. These lin s allow the lateral 5'5 movement of the frame, but do not allow ofa longitudinal movement thereof.

I- provide means for giving the concentrating table a lateral rocking motion when the machine is in operation. For this pur ose, the bounter shaft is extended at the si e of the frame 1, as indicated in Fi 3, and by. means of bevel ears 43 this s aft is connected with a sha er shaft 44 which extends longitudinally of the frame and is mounted in suitable bearings 45. This shaker shaft In this connection, refer-' states rods 47 with the side of the frame 28, as shown. In small machines, the blower shaft may be rotated by hand with a crank or a similar contrivance. chines, I" arrange to drive the shaft 21 by means ofa' belt or chain 48 which passesover referred toabove, is driven from the shaft 21 when the machine is in operatlon, the shuffle late 13 will bereciprocated in a direction ongitudinall of the frame.

It should e understood that the values and fall into the shoe," as, from time to time, the shoe willbe dumped. In order to enable the shoeto be dumped in the manner suggested, I provide a dumping rod 51 which extends long tudinally of the frame as shown extremity with a suita le handle. 5.2. The opposite extremity of the dumping rod is attached pivotally to a crank 53 whlch is rigid on the dumping shaft 29, as will be readily understood. Evidently, by operating this rod, the shoe may be thrown into a position such as that indicated in dotted lines in Fig. 2. When operated in this manner, the material on top of the shoe will be dumped into a receiver or pan 54, which is constructed in the lower portion of the frame 1, as indicated. The exhaust fan 40 will be driven by a belt pulley 55 rigid on the shaft thereof. In the stood that as the ore-bearing material passes over the screen top of the concentration table that the air current generated b the blower in the case 22 passes up throu the screen and .the body of the materia. In this way the hlighter gangue or earth is car.- ried away, w V are removed by fan 40 and the'hea'vier. ore remains on thetable In order to increase the efliciency of the concentrating or separating operation, I make the difierent sections of the screen of different meshes or degrees of fineness, as suggested above. I make the upper screen 32 of 120 mesh, he lower screen of 80 mesh and the intermediate screen of 100 mesh. B making the screens of different mesh in this way I equalize the force of'the air current which passes up through the screen tog) of the concentration table. In this connection it should be understood that there is a tendency for the princip t1 portion of the air to nearest to the blower. By making this screen of fin r mesh in this way, the resisttends to throw a larger quantity of the current toward the lower portion of the shoe.

7 Across the faceof the screenI provide a pluin Fig. '3, and which is rovidedat its lower operation of the machine it should be under-- pass through the i'pper screen which is ance at this point is slightly increased, which is provided with cranks 46which are 0 11.- :nected by means of pitmen or connecting In larger maa suitable pulley 49. The belt 20 which was by means of a suitable pulley 50, so that are not expected to pass through the screen e thesmall particles of dust By reason of the flexible connection 25, it

' should be understood that a perfect air-tight joint is constantly maintained between the blower trunk 24 and the shoe. The motion of the shuffle plate or feed" plate is, of course, proportional to the speed at which the machine is being driven, so that the amount of ore fed will be greater where the machine is being driven at a higher rate. of speed.

The concentrator may be used for concentrating ores carried in sand, gravel or earth.

The riffles referred to above are much higher at the end of the concentration table which receives the ore, as it is desirable to retain less material on them as the ore becomes lean. All the valuable, heavy metals are held behind the riffles and subsequently dumped into the receiving box beneath the concentration table.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: r

1. In an ore-concentraton, in combination, a frame, a rocking frame mounted therein and adapted to reciprocate, said rocking'frame having a ring formed at the end thereof, a connection from a blower to said ring whereby an air current may be delivered through said ring, a shoe rotatably mounted in said rocking frame and closing upon said ring whereby an air current may ass from said ring to said shoe, said shoe having a screen in the upper portion thereof through which an air current may pass, and means for feeding an ore-bearing material across said screen.

'2. In an ore concentrator, in combination, a frame, a rockingframe, a shoe mounted to swing on transverse pivots in said rocking frame, a blast connection leading to said shoe and having an inclined face against which said shoe seats by a swinging movement, and a screen over said shoe and through which the blast passes upwardly.

11 an ore concentrator, in combination, a frame, a rocking frame mounted thereupon, a shoe mounted to swing on transverse pivots in said rocking frame, a trunk leading a blast to said shoe, a flexible connection on said trunk, a ring attached to said flexible connection and having an inclined face disposed toward said shoe, said shoe having an inclined end adapted to seat against said inclined face by a swinging movement of said shoe, a screen above said shoe and through which the blast passes upwardly, means for advancing a material across said screen, and means for dumping said shoe.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE TOLMIE. Witnesses W. D. BRowN, R. B. HINOHOLIFF. 

